diff --git a/app/models/manager_refresh/inventory_object.rb b/app/models/manager_refresh/inventory_object.rb
index 97d962c29cb..6d6797ff6fb 100644
--- a/app/models/manager_refresh/inventory_object.rb
+++ b/app/models/manager_refresh/inventory_object.rb
@@ -215,12 +215,14 @@ def self.define_data_writer(data_key)
         public_send(:[]=, data_key.to_s.delete("=").to_sym, value)
       end
     end
+    private_class_method :define_data_writer
 
     def self.define_data_reader(data_key)
       define_method(data_key) do
         public_send(:[], data_key)
       end
     end
+    private_class_method :define_data_reader
 
     # Return true passed key representing a getter is an association
     #